It is a hand held metal detector. It does not "sniff" for drugs or explosives or detect non-metallic objects. It does not create a comparative contouring image as stated above. There are other devices in the security areas that do these tests and most are walk-through devices, some requiring you to stop momentarily (sniffer machine that is a "booth" type device that creates a "puff" of air against your body, and the full body imaging device that has created so much controversy). I hope this helps you and other readers, and not for possible detection avoidance.

Blondey, Hello. Both of the above answers are good advice. When I used to scan film,photos, etc., I would always do a "Save As". At the beginning of the scan session, I would create a file on the desktop, called "Scans, project name, and date". I would then save all the new scans to this file. It ...